There were 3,083 households of which 37.1% had children under the age of 18 living with them, 61.4% were married couples living together, 11.1% had a female householder with no husband present, and 22.7% were non-families. 17.5% of all households were made up of individuals and 5.4% had someone living alone who was 65 years of age or older. The average household size was 2.72 and the average family size was 3.06.

27.6% of the population were under the age of 18, 7.9% from 18 to 24, 31.2% from 25 to 44, 24.2% from 45 to 64, and 9.1% who were 65 years of age or older. The median age was 35 years. For every 100 females there were 101.7 males. For every 100 females age 18 and over, there were 97.8 males.

The median household income was $40,976 and the median family income was $46,842. Males had a median income of $32,239 versus $22,273 for females. The per capita income for the CDP was $17,643. About 7.2% of families and 10.6% of the population were below the poverty line, including 13.2% of those under age 18 and 13.9% of those age 65 or over.

The Yulee area is served by two fire departments. It is served by the all career Nassau County Fire Rescue Stations 30 and 70. Yulee also has its own fire department. The "Yulee Volunteer Fire Department" is dispatched along with the County department to all fire calls in the Yulee area.